2005 GMC Duramax won't start. - Chevy and GMC Duramax Diesel Forum
911 Problems Forum Truck won't start or drive? Post here!

LinkBack Thread Tools Display Modes
post #1 of 12 (permalink) Old 09-27-2007, 04:23 PM Thread Starter
Join Date: Sep 2007
Posts: 1
Angry 2005 GMC Duramax won't start.

I have a 2005 GMC Duramax diesel and have recently been having a no start problem. Last week I parked my truck in the evenining, the folowing morning it would not start. It turned over great but would not fire. I checked the electrical connections under the hood and tried again, still would not fire, primed the fuel filter and tried again, still wouldn't fire. Finally had the truck towed to the shop. They hadit for the day and said the found a bad connection in the plug connections under the hood. Took the truck home, ran fine, next morning started fine and ran well all day. Parked it Friday evening, went to start it monday morning and same thing, turns over well but won't fire. I unplugged the connection they had told me about and retried after every check I made, wouldn't fire. Had it towed to the shop. They said after it was unloaded they tried it and if fired right up. Ran fine that afternoon, parked it that night and started it the next morning, ran fine all day. Parked it at night, next morning it wouldn't start. Repair tech came to house late afternoon, tried it and it fired right up. Truck is currently still at the shop as they have not been able to determine the problem. Anybody else heard of such a problem?? The truck does have an Edge chip in it, we removed it from the system and tried to start it several times when it wouldn't go and it still wouldn't fire. The GM shop could not find any codes on their scanner any of the three times to help with diagnosis either. Any help or suggestions would really be appreciated.

hemibadfish is offline  
Sponsored Links
post #2 of 12 (permalink) Old 10-04-2007, 06:48 PM
Join Date: Oct 2007
Posts: 3
when my 04 lb7 did that sim. prob. i took it to the dealer they replaced a kimked fuel line on top of eng that goes to the pump but that did not solve the prob i simply started using the other ign. key truck has stsrted & ran fine since
tref is offline  
post #3 of 12 (permalink) Old 10-05-2007, 08:58 PM
ob_1jr's Avatar
Join Date: Aug 2005
Location: Syracuse, UT
Posts: 8,651
Send a message via Yahoo to ob_1jr
Have a look at the #2 and #7 injector harness, they are known for chafing and there is a TSB out for it. When is the last time you changed your fuel filter? Are you able to pressurize the system with the primer and not cracking the bleed screw? Those primer pumps have been known to go bad and cause problems.

2016 GMC Sierra 2500HD Denali
Extang Blackmax Tonneau
Weathertech floor mats and mud flaps
X-pel clear bra
295/60-20 Toyo Open Country A/T II

SOLD 2004 GMC Sierra LB7
ob_1jr is offline  
post #4 of 12 (permalink) Old 10-17-2007, 04:26 AM
Join Date: Oct 2007
Posts: 1
I had the same story, just the way you described it-the dealer could not find a problem until I had them park it on an incline. Two hours later the truck would not start-no fuel pressure. They said the problem is the fuel filter housing. They said it would take 2 days for part to arrive. I will let you know it this fixes the no start problem. My truck is a 2006 Duramax.
unclebob is offline  
post #5 of 12 (permalink) Old 10-17-2007, 02:10 PM
Junior Member
Join Date: Oct 2007
Location: Kansas City, Missouri
Posts: 57
Ok, I'm no mechanic & I'm sure you guys have it covered but if you all remember on the 02's they had an injector problem. My 02 had the defective injectors & it would do exactly as you are describing. It drove me crazy. The quick fix that usually worked, not always, would be to loosen the screw on top of the filter & prime it until fuel came out. Might try that.
Electric Boss is offline  
post #6 of 12 (permalink) Old 09-07-2010, 09:52 AM
Join Date: Sep 2010
Posts: 1
I have an '03 duramax (with 135,000 miles) that's doing the exact same thing. It had all new injectors installed last year under warranty, and has the (long ago) updated fuel filter housing. Every once in a while for no apparent reason, it will just crank all day, and never fire. Sometimes it's right after I shut it off, and sometimes it's when it's cold. Doesn't seem to matter if it's level ground or on a slope. I get it towed to the dealer, and it usually fires right up. The only code it's ever thrown was something to do with the injector pump harness so they checked it out, cleaned it, and sent me home. Was fine for 3 or 4months. I put a new fuel filter on it two weeks ago, ran fine ever since, then I go out yesterday morning, and it won't start. I can bleed and prime all I want, and it makes no difference. Now I'm missing a day of work today b/c I'm stranded 4 hours out of the city. I'm pretty methodical about trying to diagnose stuff. So far what i haven't had checked is the injector harnesses as mentioned above, or the return pressure. That's next. I'm pretty suspicious that it's not mechanical fuel starvation (pinched line), or air, as those problems would cause it to run bad or not start, on a continual basis. Like I said, it's very random, always out of the blue, and then the truck might run/start fine for 3 or 4 months. Any other suggestions from guys who have had this problem? BTW, the truck is completely stock, doesn't smoke abnormally, runs great once it's going. Could this be a ground issue? I did have trouble with my 4x4 a few years ago, and it turned out to be a dirty ground that was causing that problem. @ Hemibadfish: Sorry to highjack your thread. I would have started a new one, but I figured we might both benefit from what other guys have to say. Hope you dont mind.
Canucktruck is offline  
post #7 of 12 (permalink) Old 03-16-2011, 11:05 AM
Join Date: Mar 2011
Posts: 1
My father in law has a duramax that had about the same problem. When starting it would crank and crank without starting, finally it would start. Sometime it would start ok most of the time it would crank and crank. The dealer could not find anything wrong. He ended up replacing the entire fuel line from the tank forward. That fixed it . It now starts great. The dealer wanted about $400 for the FACTORY FUEL LINE REPLACEMENT he used a rubber line from NAPA for about $25. Must be from the salt on the roads?
jackpot2594 is offline  
post #8 of 12 (permalink) Old 03-19-2011, 11:58 AM
Join Date: Mar 2011
Posts: 5
I have the exact same problem when it does start runs great all the power you need at this point i can't get mine to start anymore at all.
rtravis is offline  
post #9 of 12 (permalink) Old 03-19-2011, 12:42 PM
jc1843's Avatar
Join Date: Jun 2008
Location: So. Cal
Posts: 16,158
Send a message via AIM to jc1843
Inspect the FICM wire harness at the passenger side of the alternator. The harness and wires get cut, and sometimes short to ground, by contact with the sharp corner of the FICM bracket.

The harness is tied down with a zip tie, cut the zip tie and look carefully at the under side. Insulate with a piece of heater hose.

This is a common problem for the LLY engine.

Everyone that has a LLY should check this now!

Chevy 04.5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, shimmed, Pre-fuel filter, tow mirrors, BU cam, gauges, GPS, Sirius, bags, custom grille, fender vents, HD trans cooler- Curt front hitch, footwell lights, load lights, Studs, head gaskets.
jc1843 is online now  
post #10 of 12 (permalink) Old 07-02-2011, 05:16 PM
Join Date: Jul 2011
Posts: 1

I joined this forum specifically to thank you for your march 2011 forum post regarding FICM wire harness. I was having a goofy no start problem, searching the net, filtering through irrational ideas and then i came across your post. Went out to my truck...sure as Shite, once I located what you described, cut the zip tie, turned over the taped harness, I could see shining metal wires and visible arching onto the brace. fixed that, hit the prime button a few times....back in business. Dude, you just saved me an awful amount of time and money!!!!!
tomhavey228@gmail.xom is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevy and GMC Duramax Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome